At least once per hour when watching or recording HD channels I get very bad pixelation and break up of the picture. When it's really bad, the box reboots itself. I did have the custom firmware installed, so yesterday I manually installed the official firmware, then I reformatted the HDD, ran the HDD test (no errors reported), factory reset and retuned, making sure that the channels tuned are what digitaltv.co.uk says they should be for my post code. The problems recurred within 2 hours of all of this. Signal strength is always between 75 and 80%, and quality always reported as 100% Upstairs I have a freeview HD TV which has never pixelated, so I do not think that this can be blamed on my aerial or coax in the house. Has anybody else seen similar problems? Should I be asking HUMAX for a replacement?